Ubuntu 11.04 the front panel ear phone output is not responsive
I installed my first Ubuntu 11.04 two days ago in my Desktop model which has Intel Chipset powered by Mercury. I installed it alongside Windows XP. I like the entire package. I am yet to discover its full potentials. However, the immediate problem I am facing is that my front panel ear phone output is not working. The one on the back of the CPU in which the 5.1 speakers are connected is working just fine. I tried going to Sound Administrator and selected Analog input and Analog output in the settings. As I am not sure how this could be set right, kindly help me with it. I find the entire environment overwhelming, so please give me instructions as simple as possible.
Lakshmi Narayan. V